Struts2实现猜数小游戏

    这是一个struts学习的入门实例，用一个比较简单的猜数游戏来实现struts2的MVC三层结构的设计思想，对于学习Struts2的初学者来说，是一个很不错的练习实例。1、数据实体访问层DAO?package dao;import java.sql.Connection;import java.sql.PreparedStatement;import java.sql.ResultSet;import java.sql.SQLException;import java.util.ArrayList;import java.util.List;import util.DBConnection;import entity.Players;/** * 数据访问类：主要实现对数据的访问换个操作 * @author niliang * */public class DaoGuess {/** * 该方法实现注册用户 * @param p Players对象 * @throws Exception */public void add(Players p) throws Exception {String sql = "insert into guess_user (name,password,times) values(?,?,?)";Connection conn = DBConnection.getConnection();PreparedStatement pst = conn.prepareStatement(sql);pst.setString(1, p.getName());pst.setString(2, p.getPwd());  pst.setInt(3, p.getScore());pst.executeUpdate(); DBConnection.close(conn);}/** * 该方法实现显示所有已注册的Players对象信息 * @return Players类型的List集合 * @throws Exception */public List<Players> findAll() throws Exception {String sql = "select * from guess_user order by times";List<Players> persons = new ArrayList<Players>();Connection cn = DBConnection.getConnection();PreparedStatement ps = null;ResultSet rs = null;try {ps = cn.prepareStatement(sql);rs = ps.executeQuery();while (rs.next()) {Players p = new Players();p.setId(rs.getInt(1));p.setName(rs.getString(2));p.setPwd(rs.getString(3));  p.setScore(rs.getInt(4));persons.add(p); }} catch (SQLException e) {e.printStackTrace();}DBConnection.close(rs, ps, cn);return persons;}/** * 该方法根据指定name查询Players对象信息 * @param name 玩家帐号 * @return 返回一个Players对象 * @throws Exception */public Players find(String name) throws Exception {Players p = null;String sql = "select * from guess_user where name=?";Connection conn = DBConnection.getConnection();PreparedStatement pst = conn.prepareStatement(sql);pst.setString(1, name);ResultSet rs = pst.executeQuery();if(rs.next()){p=new Players();p.setId(rs.getInt(1));p.setName(rs.getString(2));p.setPwd(rs.getString(3));p.setScore(rs.getInt(4));}DBConnection.close(conn);return p;}/** * 该方法实现更新数据 * @param times 玩家猜数完成的次数 * @param id 玩家编号 * @throws Exception */public void update(int times,int id) throws Exception{String sql = "update guess_user set times=? where id=?";Connection conn = DBConnection.getConnection();PreparedStatement pst = conn.prepareStatement(sql);pst.setInt(1,times);pst.setInt(2,id); pst.executeUpdate();DBConnection.close(conn);} }2.实体类POJO? package entity;/** * 实体数据类：Players对象 * @author niliang * */public class Players {/** *Players对象的基本属性信息  */private int id;private String name;private String pwd;private int score=100;//默认值为100/** * 属性Id的get()方法 * @return */public int getId() {return id;}/** * 属性Id的set()方法 * @param id */public void setId(int id) {this.id = id;}/** * 属性Name的get()方法 * @return */public String getName() {return name;}/** * 属性Name的set()方法 * @param name */public void setName(String name) {this.name = name;}/** * 属性Pwd的get()方法 * @return */public String getPwd() {return pwd;}/** * 属性Pwd的set()方法 * @param pwd */public void setPwd(String pwd) {this.pwd = pwd;}/** * 属性Score的get()方法 * @return */public int getScore() {return score;}/** * 属性Score的set()方法 * @param score */public void setScore(int score) {this.score = score;}}?/******************游戏信息实体类*******************************/package game;/** * 实体数据类：GameInfo游戏信息 * @author niliang * */public class GameInfo {private int times;private int answer;private boolean success;private String msg; private String player;/** * 属性Player的get()方法 * @return */public String getPlayer() {return player;}/** * 属性Player的set()方法 * @param player */public void setPlayer(String player) {this.player = player;}/** * 属性Msg的get()方法 * @return */public String getMsg() {return msg;}/** * 属性Msg的set()方法 * @param msg */public void setMsg(String msg) {this.msg = msg;}/** * 属性Sucess的get()方法 * @return */public boolean isSuccess() {return success;}/** * 属性Success的set()方法 * @param success */public void setSuccess(boolean success) {this.success = success;}/** * 属性Times的get()方法 * @return */public int getTimes() {return times;}/** * 属性Times的set()方法 * @param times */public void setTimes(int times) {this.times = times;}/** * 属性Answer的get()方法 * @return */public int getAnswer() {return answer;}/** * 属性Anwser的set()方法 * @param answer */public void setAnswer(int answer) {this.answer = answer;}}?3猜数游戏业务的实现package game;import java.util.Random;/** * 业务逻辑：实现猜数游戏的业务逻辑 * @author niliang * */public class GuessNumber {/** * 该方法实现猜数游戏 * @param guessNum 用户输入的数字 * @param info输出的提示消息 */public void guess(int guessNum,GameInfo info){info.setTimes(info.getTimes()+1);if(guessNum == info.getAnswer()){info.setSuccess(true);info.setMsg("(O-^_^-O)恭喜你，你当前用了"+info.getTimes()+"次猜中!!!");}else if(guessNum<info.getAnswer()){info.setMsg("^_^你猜的数小了，再大点吧");}else{info.setMsg("^_^你猜的数大了,再小点吧");}}/** * 该方法实现重置游戏 * @param info */public void reset(GameInfo info){Random random=new Random(); int answer=random.nextInt()%100;answer=Math.abs(answer)+1;System.out.println("random:"+answer);info.setAnswer(answer);info.setTimes(0);info.setSuccess(false);info.setMsg("");}}?4.基本登陆注册的actionpackage game;import java.util.Random;/** * 业务逻辑：实现猜数游戏的业务逻辑 * @author niliang * */public class GuessNumber {/** * 该方法实现猜数游戏 * @param guessNum 用户输入的数字 * @param info输出的提示消息 */public void guess(int guessNum,GameInfo info){info.setTimes(info.getTimes()+1);if(guessNum == info.getAnswer()){info.setSuccess(true);info.setMsg("(O-^_^-O)恭喜你，你当前用了"+info.getTimes()+"次猜中!!!");}else if(guessNum<info.getAnswer()){info.setMsg("^_^你猜的数小了，再大点吧");}else{info.setMsg("^_^你猜的数大了,再小点吧");}}/** * 该方法实现重置游戏 * @param info */public void reset(GameInfo info){Random random=new Random(); int answer=random.nextInt()%100;answer=Math.abs(answer)+1;System.out.println("random:"+answer);info.setAnswer(answer);info.setTimes(0);info.setSuccess(false);info.setMsg("");}}////////////////////////////////////////////////////////////////package action;import java.util.Map;import com.opensymphony.xwork2.ActionContext;import com.opensymphony.xwork2.ActionInvocation;import com.opensymphony.xwork2.interceptor.AbstractInterceptor;import entity.Players;/** * 拦截器：登录检查 * @author niliang * */public class LoginCheck extends AbstractInterceptor{/** *  */private static final long serialVersionUID = 2490404583704112520L;@Override/** * 重写intercept方法，执行登录检查 */public String intercept(ActionInvocation invocation) throws Exception { ActionContext ac=invocation.getInvocationContext(); Map<String,Object> session=ac.getSession(); Players user=(Players)session.get("user"); if(user==null){ return "login"; }else{ return invocation.invoke(); }}} //////////////////////////////////////////////////////////////////////////////package action;import java.util.List;import dao.DaoGuess;import entity.Players;public class Option {/** * 属性玩家列表集合 */List<Players> list;/** * 属性list的get()方法 * @return 返回Players类型的集合 */public List<Players> getList() {return list;}/** * 属性list的set()方法 * @param list */public void setList(List<Players> list) {this.list = list;}/** * 该方法显示所有用户 * @return */public String execute(){DaoGuess dao=new DaoGuess();try {list=dao.findAll();return "show";} catch (Exception e) { e.printStackTrace();return "error";}}}////////////////////////////////////////////////////////////////////////package action;import org.apache.struts2.ServletActionContext;import dao.DaoGuess;import entity.Players;/** * 注册玩家的Action * @author niliang * */public class RegistAction {/** * 属性Players对象 */private Players p; /** * 属性 p的get()方法 * @return 返回一个Players对象 */public Players getP() {return p;}/** * 属性 p的set()方法 * @param p */public void setP(Players p) {this.p = p;} DaoGuess dao=new DaoGuess();/** * 该方法执行注册Action * @return */public String execute(){try {Players player=dao.find(p.getName());//判断玩家是否已经注册if(player!=null){ServletActionContext.getRequest().setAttribute("reg_error", "帐号已存在");return "wrong";}//保存dao.add(p);return "add";} catch (Exception e) { e.printStackTrace();return "error";}}}?5Struts2的配置文件struts.xml<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE struts PUBLIC    "-//Apache Software Foundation//DTD Struts Configuration 2.1.7//EN"    "http://struts.apache.org/dtds/struts-2.1.7.dtd"><struts><constant name="struts.action.extension" value="do"/><package name="guessGame" extends="struts-default"><!-- 登录拦截 --><interceptors><interceptor name="logincheck" type="redirect">/menu.jsp</result><result name="exit" type="redirect">/login.jsp</result></action><!-- 注册 --><action name="regist" type="redirect">/login.jsp</result><result name="wrong">/add_player.jsp</result></action><action name="guess" type="redirect">/guess.jsp</result></action><action name="option" class="action.Option"><interceptor-ref name="demoStack"/><result name="show">/showInfo.jsp</result></action></package></struts>    当然这里还有一个连接数据库的连接池的类(DBConnection.java)就没有列出来，读者朋友们可以自己加上。